create table Table1(
Col1 int,
Col2 varchar(255),
Col3 datetime,
Col4 char(10)
)
create index ix_test on Table1(Col2) INCLUDE(Col1,Col3,Col4)
-> Lets check the table properties. There is no clustered index and Table Table1 is a heap.
-> Insert few rows,
insert into Table1 values (1,'test',getdate(),'test1')
go 1000
-> Lets execute below query with execution plan enabled,
select Col1,Col2,Col3,Col4 from Table1 where Col2='Test'
-> Lets execute below query and see if we can get a table scan,
select Col1,Col2,Col3,Col4 from Table1 with (FORCESCAN) where Col2='Test'
-> From above screenshot, we see that we have an index scan. But we were looking for a table scan.
-> Lets us check the sysindexes system table using below query and see what we have,
select object_name(object_id) TableName,name,index_id,type,type_desc from sys.indexes where object_id=OBJECT_ID('Table1')
-> Lets force Index_id 0 and see if we can get a table scan,
select Col1,Col2,Col3,Col4 from Table1 with (index(0)) where Col2='Test'
-> There you go!!! we have a table scan.
Thank You, Vivek Janakiraman
Disclaimer: The views expressed on this blog are mine alone and do not reflect the views of my company or anyone else. All postings on this blog are provided “AS IS” with no warranties, and confers no rights.
-> Availability group secondary database was “Not Synchronizing”.
-> Below is the view of Always On Dashboard,
-> SQL Server Error log
JBSAG1
2022-06-14 05:08:04.130 spid11s Always On: DebugTraceVarArgs AR ‘[HADR] [Primary] operation on replicas [CF81C5D4-0DBF-4573-AB9D-018423FB92B2]->[0E5B3832-3DDA-41CB-9730-0F119639B535], database [JBSAG12], remote endpoint [TCP://JBSAG2.JBSWIKI.com:5022], source operation [708829B5-E20D-4112-9D88-050797FE9D91]: Transitioning from [PENDING] to [CHECK_IF_SEEDING_NEEDED].’ 2022-06-14 05:08:04.130 spid44s A connection for availability group ‘JBAG12’ from availability replica ‘JBSAG1’ with id [CF81C5D4-0DBF-4573-AB9D-018423FB92B2] to ‘JBSAG2’ with id [0E5B3832-3DDA-41CB-9730-0F119639B535] has been successfully established. This is an informational message only. No user action is required. 2022-06-14 05:08:04.130 spid37s Always On Availability Groups connection with secondary database established for primary database ‘JBSAG12’ on the availability replica ‘JBSAG2’ with Replica ID: {0e5b3832-3dda-41cb-9730-0f119639b535}. This is an informational message only. No user action is required. 2022-06-14 05:08:04.130 spid68s Always On: DebugTraceVarArgs AR ‘[HADR] [Primary] operation on replicas [CF81C5D4-0DBF-4573-AB9D-018423FB92B2]->[0E5B3832-3DDA-41CB-9730-0F119639B535], database [JBSAG12], remote endpoint [TCP://JBSAG2.JBSWIKI.com:5022], source operation [708829B5-E20D-4112-9D88-050797FE9D91]: Transitioning from [CHECK_IF_SEEDING_NEEDED] to [CATCHUP].’ 2022-06-14 05:08:04.150 spid68s Always On: DebugTraceVarArgs AR ‘[HADR] [Primary] operation on replicas [CF81C5D4-0DBF-4573-AB9D-018423FB92B2]->[0E5B3832-3DDA-41CB-9730-0F119639B535], database [JBSAG12], remote endpoint [TCP://JBSAG2.JBSWIKI.com:5022], source operation [708829B5-E20D-4112-9D88-050797FE9D91]: Transitioning from [CATCHUP] to [COMPLETED].’ 2022-06-14 05:08:04.170 spid37s [DbMgrPartnerCommitPolicy::SetReplicaInfoInAg] DbMgrPartnerCommitPolicy::SetSyncAndRecoveryPoint: 0E5B3832-3DDA-41CB-9730-0F119639B535:6:4 2022-06-14 05:08:04.170 spid37s DbMgrPartnerCommitPolicy::SetSyncState: 0E5B3832-3DDA-41CB-9730-0F119639B535:6:4 2022-06-14 05:08:41.350 spid68s A connection timeout has occurred on a previously established connection to availability replica ‘JBSAG2’ with id [0E5B3832-3DDA-41CB-9730-0F119639B535]. Either a networking or a firewall issue exists or the availability replica has transitioned to the resolving role. 2022-06-14 05:08:41.350 spid68s Always On Availability Groups connection with secondary database terminated for primary database ‘JBSAG12’ on the availability replica ‘JBSAG2’ with Replica ID: {0e5b3832-3dda-41cb-9730-0f119639b535}. This is an informational message only. No user action is required. 2022-06-14 05:08:41.360 spid83s [DbMgrPartnerCommitPolicy::SetReplicaInfoInAg] DbMgrPartnerCommitPolicy::SetSyncAndRecoveryPoint: 0E5B3832-3DDA-41CB-9730-0F119639B535:6:1 2022-06-14 05:08:41.360 spid83s DbMgrPartnerCommitPolicy::SetSyncState: 0E5B3832-3DDA-41CB-9730-0F119639B535:6:1
JBSAG2
2022-06-14 05:07:07.030 spid76s A connection timeout has occurred on a previously established connection to availability replica ‘JBSAG1’ with id [CF81C5D4-0DBF-4573-AB9D-018423FB92B2]. Either a networking or a firewall issue exists or the availability replica has transitioned to the resolving role. 2022-06-14 05:07:07.030 spid76s Always On Availability Groups connection with primary database terminated for secondary database ‘JBSAG12’ on the availability replica ‘JBSAG1’ with Replica ID: {cf81c5d4-0dbf-4573-ab9d-018423fb92b2}. This is an informational message only. No user action is required. 2022-06-14 05:07:17.040 spid76s A connection timeout has occurred while attempting to establish a connection to availability replica ‘JBSAG1’ with id [CF81C5D4-0DBF-4573-AB9D-018423FB92B2]. Either a networking or firewall issue exists, or the endpoint address provided for the replica is not the database mirroring endpoint of the host server instance. 2022-06-14 05:08:04.130 spid31s A connection for availability group ‘JBAG12’ from availability replica ‘JBSAG2’ with id [0E5B3832-3DDA-41CB-9730-0F119639B535] to ‘JBSAG1’ with id [CF81C5D4-0DBF-4573-AB9D-018423FB92B2] has been successfully established. This is an informational message only. No user action is required. 2022-06-14 05:08:04.130 spid12s Always On: DebugTraceVarArgs AR ‘[HADR] [Secondary] operation on replicas [CF81C5D4-0DBF-4573-AB9D-018423FB92B2]->[0E5B3832-3DDA-41CB-9730-0F119639B535], database [JBSAG12], remote endpoint [TCP://JBSAG1.JBSWIKI.com:5022], source operation [708829B5-E20D-4112-9D88-050797FE9D91]: Transitioning from [PENDING] to [CHECK_IF_SEEDING_NEEDED].’ 2022-06-14 05:08:04.130 spid85s Error: 41145, Severity: 16, State: 1. 2022-06-14 05:08:04.130 spid85s Cannot join database ‘JBSAG12’ to availability group ‘JBAG12’. The database has already joined the availability group. This is an informational message. No user action is required. 2022-06-14 05:08:04.130 spid85s Always On: DebugTraceVarArgs AR ‘[HADR] [Secondary] operation on replicas [CF81C5D4-0DBF-4573-AB9D-018423FB92B2]->[0E5B3832-3DDA-41CB-9730-0F119639B535], database [JBSAG12], remote endpoint [TCP://JBSAG1.JBSWIKI.com:5022], source operation [708829B5-E20D-4112-9D88-050797FE9D91]: Transitioning from [CHECK_IF_SEEDING_NEEDED] to [CATCHUP].’ 2022-06-14 05:08:04.130 spid85s Always On: DebugTraceVarArgs AR ‘Processing BuildReplicaCatchup event with HADR Role: [SECONDARY]’ 2022-06-14 05:08:04.130 spid85s Always On: DebugTraceVarArgs AR ‘[HADR] [Secondary] operation on replicas [CF81C5D4-0DBF-4573-AB9D-018423FB92B2]->[0E5B3832-3DDA-41CB-9730-0F119639B535], database [JBSAG12], remote endpoint [TCP://JBSAG1.JBSWIKI.com:5022], source operation [708829B5-E20D-4112-9D88-050797FE9D91]: Transitioning from [CATCHUP] to [COMPLETED].’ 2022-06-14 05:08:04.130 spid31s Always On Availability Groups connection with primary database established for secondary database ‘JBSAG12’ on the availability replica ‘JBSAG1’ with Replica ID: {cf81c5d4-0dbf-4573-ab9d-018423fb92b2}. This is an informational message only. No user action is required. 2022-06-14 05:08:04.130 spid31s The recovery LSN (37:1200:1) was identified for the database with ID 6. This is an informational message only. No user action is required. 2022-06-14 05:08:32.050 spid52 The Database Mirroring endpoint has stopped listening for connections. 2022-06-14 05:08:34.070 spid52 The Database Mirroring endpoint is in disabled or stopped state. 2022-06-14 05:08:34.070 spid77s The connection between server instances ‘JBSAG2’ with id [0E5B3832-3DDA-41CB-9730-0F119639B535] and ‘JBSAG1’ with id [CF81C5D4-0DBF-4573-AB9D-018423FB92B2] has been disabled because the database mirroring endpoint was either disabled or stopped. Restart the endpoint by using the ALTER ENDPOINT Transact-SQL statement with STATE = STARTED. 2022-06-14 05:08:34.080 spid77s Always On Availability Groups connection with primary database terminated for secondary database ‘JBSAG12’ on the availability replica ‘JBSAG1’ with Replica ID: {cf81c5d4-0dbf-4573-ab9d-018423fb92b2}. This is an informational message only. No user action is required. 2022-06-14 05:09:09.370 spid84 ALTER DB param option: SUSPEND 2022-06-14 05:09:09.370 spid84 Always On Availability Groups data movement for database ‘JBSAG12’ has been suspended for the following reason: “user” (Source ID 0; Source string: ‘SUSPEND_FROM_USER’). To resume data movement on the database, you will need to resume the database manually. For information about how to resume an availability database, see SQL Server Books Online. 2022-06-14 05:09:26.920 spid81 ALTER DB param option: RESUME 2022-06-14 05:09:26.920 spid81 Always On Availability Groups data movement for database ‘JBSAG12’ has been resumed. This is an informational message only. No user action is required.
-> From the SQL Server error log on secondary JBSAG2, we can see that mirroring endpoint is stopped.
-> Lets check the DMV’s for more details,
select r.replica_server_name, r.endpoint_url,
rs.connected_state_desc, rs.last_connect_error_description,
rs.last_connect_error_number, rs.last_connect_error_timestamp
from sys.dm_hadr_availability_replica_states rs join sys.availability_replicas r
on rs.replica_id=r.replica_id
JBSAG1
Connection attempt failed with error: ‘10060(A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.)’.
JBSAG2
The Database Mirroring endpoint is in disabled or stopped state.
-> Lets try starting the mirroring endpoint using below command on Secondary JBSAG2,
ALTER ENDPOINT [Hadr_endpoint] STATE = STARTED
-> Once above command completes, I can see databases on Availability group as synchronized,
Thank You, Vivek Janakiraman
Disclaimer: The views expressed on this blog are mine alone and do not reflect the views of my company or anyone else. All postings on this blog are provided “AS IS” with no warranties, and confers no rights.
TITLE: Connect to Database Engine Cannot connect to JBSAG1. ADDITIONAL INFORMATION:
Unable to access availability database ‘JBSAG12’ because the database replica is not in the PRIMARY or SECONDARY role. Connections to an availability database is permitted only when the database replica is in the PRIMARY or SECONDARY role. Try the operation again later. (Microsoft SQL Server, Error: 983) For help, click: https://docs.microsoft.com/sql/relational-databases/errors-events/mssqlserver-983-database-engine-error
Microsoft ODBC Driver 17 for SQL Server : Unable to access availability database ‘JBSAG12’ because the database replica is not in the PRIMARY or SECONDARY role. Connections to an availability database is permitted only when the database replica is in the PRIMARY or SECONDARY role. Try the operation again later.
-> I checked the database and Always ON availability group status. Database was “Not Synchronizing” and Availability group was resolving,
SQL Server Errorlog
JBSAG1
2022-06-13 06:42:24.070 spid58 Always On: The local replica of availability group ‘JBAG12’ is preparing to transition to the resolving role. This is an informational message only. No user action is required. 2022-06-13 06:42:24.070 Server The availability group ‘JBAG12’ is being asked to stop the lease renewal because the availability group is going offline. This is an informational message only. No user action is required. 2022-06-13 06:42:24.070 spid58 The state of the local availability replica in availability group ‘JBAG12’ has changed from ‘PRIMARY_NORMAL’ to ‘RESOLVING_NORMAL’. The state changed because the availability group is going offline. The replica is going offline because the associated availability group has been deleted, or the user has taken the associated availability group offline in Windows Server Failover Clustering (WSFC) management console, or the availability group is failing over to another SQL Server instance. For more information, see the SQL Server error log or cluster log. If this is a Windows Server Failover Clustering (WSFC) availability group, you can also see the WSFC management console. 2022-06-13 06:42:24.070 spid78s Always On Availability Groups connection with secondary database terminated for primary database ‘JBSAG12’ on the availability replica ‘JBSAG2’ with Replica ID: {0e5b3832-3dda-41cb-9730-0f119639b535}. This is an informational message only. No user action is required. 2022-06-13 06:42:24.080 spid42s The availability group database “JBSAG12” is changing roles from “PRIMARY” to “RESOLVING” because the mirroring session or availability group failed over due to role synchronization. This is an informational message only. No user action is required. 2022-06-13 06:42:24.090 spid42s State information for database ‘JBSAG12’ – Hardened Lsn: ‘(37:1184:1)’ Commit LSN: ‘(37:1144:5)’ Commit Time: ‘Jun 12 2022 4:48AM’ 2022-06-13 06:42:24.090 spid42s Microsoft Distributed Transaction Coordinator (MS DTC) resource manager [JBSAG12] has been released. This is an informational message only. No user action is required. 2022-06-13 06:44:55.330 Logon Error: 983, Severity: 14, State: 1. 2022-06-13 06:44:55.330 Logon Unable to access availability database ‘JBSAG12’ because the database replica is not in the PRIMARY or SECONDARY role. Connections to an availability database is permitted only when the database replica is in the PRIMARY or SECONDARY role. Try the operation again later. 2022-06-13 06:55:06.730 Logon Error: 983, Severity: 14, State: 1. 2022-06-13 06:55:06.730 Logon Unable to access availability database ‘JBSAG12’ because the database replica is not in the PRIMARY or SECONDARY role. Connections to an availability database is permitted only when the database replica is in the PRIMARY or SECONDARY role. Try the operation again later.
JBSAG2
2022-06-13 06:36:11.050 spid25s The recovery LSN (37:1176:1) was identified for the database with ID 6. This is an informational message only. No user action is required. 2022-06-13 06:42:23.960 spid29s Always On: The local replica of availability group ‘JBAG12’ is going offline because the corresponding resource in the Windows Server Failover Clustering (WSFC) cluster is no longer online. This is an informational message only. No user action is required. 2022-06-13 06:42:23.960 spid29s The state of the local availability replica in availability group ‘JBAG12’ has changed from ‘SECONDARY_NORMAL’ to ‘RESOLVING_NORMAL’. The state changed because the availability group state has changed in Windows Server Failover Clustering (WSFC). For more information, see the SQL Server error log or cluster log. If this is a Windows Server Failover Clustering (WSFC) availability group, you can also see the WSFC management console. 2022-06-13 06:42:23.960 spid41s Always On Availability Groups connection with primary database terminated for secondary database ‘JBSAG12’ on the availability replica ‘JBSAG1’ with Replica ID: {cf81c5d4-0dbf-4573-ab9d-018423fb92b2}. This is an informational message only. No user action is required. 2022-06-13 06:42:23.960 spid47s The availability group database “JBSAG12” is changing roles from “SECONDARY” to “RESOLVING” because the mirroring session or availability group failed over due to role synchronization. This is an informational message only. No user action is required. 2022-06-13 06:42:23.960 spid47s State information for database ‘JBSAG12’ – Hardened Lsn: ‘(37:1184:1)’ Commit LSN: ‘(37:1144:5)’ Commit Time: ‘Jun 12 2022 4:48AM’
-> In my case, there was a network issue wherein the nodes were removed from cluster due to quorum loss and then came back online automatically. But the Always On Cluster role went down as shown in below screenshot,
-> I was sure that Cluster was online and also that the nodes are all available. I right clicked on Role “JBAG12” and clicked on “Start Role”. it came online without issues,
-> Availability group came online and everything was working fine,
Thank You, Vivek Janakiraman
Disclaimer: The views expressed on this blog are mine alone and do not reflect the views of my company or anyone else. All postings on this blog are provided “AS IS” with no warranties, and confers no rights.
